Pev has advised that an LM.txt file with the line "multiplier = 0.0;" completely screws up the LOD for the associated mesh. This seems to be a change in behaviour between Tane/HF1, which appears to ignore the parameter, and Tane/HF2 which doesn't. CM validation doesn't pick this up.

This can arise due to a bug in the LOD editor in AssetX (which can also set "version=0.0;") when an LM.txt is created from scratch. The bug has been fixed but it will take a little time before publication.